<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>

<body>
  <h3>演示中间件 表单 Post 提交数据</h3>

  <form action="/postdata" method="POST">
    <p>用户名：
      <input type="text" name="username">
    </p>
    <p>密码：
      <input type="password" name="password">
    </p>
    <input type="submit" value="提交">
  </form>
</body>

</html>